Stuffing-box.



J. H. REESE & T. F. DUNLAVY.

STUFFING BOX.

APPLIOATIOE FILED PEB.23,1910.

972,247, Patented Oct. 11, 1910.

Inventor- Jbn J1. Rce.se witnesses. Theron I'T'Dunlavy.

' UNITED STATES PATENT OFFICE.

JOHN H. REESE AND THERON F. DUNLAVY, 'OF COLEGROVE, CALIFORNIA, ASSIGNORS OF ONE-THIRD TO GEORGE G. HUNT, OF CQLEGROVE, CALIFORNIA.

STUFFING-BOX.

To all whom it may concern:

Be it known that we, JOHN H. REESE and THERON F. DUNLAVY, citizens of the United States, residing at Oolegrove, inthe county of Los Angeles and State of California, have invented new and useful Improvements in Stuffing-Boxes, of which the following is a specification.

This invention relates to stufling boxes and particularly to the stufling boxes which. are used at the mouths of deep wells such as gas wells or oil wells, although particularly useful in this connection, the stuffing box is useful wherever a reciprocating rod must be packed to prevent the escape of the gas or liquid under pressure.

With stufiing boxes as ordinarily constructed inconnection with oil wells when' it is necessary to repack the boxes a quantity of oil usually spurts upwardly when the box is opened causing inconvenience, annoyance and financial loss.

The object of this invention is to produce a stufling box of special construction which can be repacked without permitting the escape of any oil at the side of the rod.

In the figure which fully illustrates our invention, 1 represents the main box, which is in the form of a socket open at its lower end and having internal threads 2 adapted to receive a plug 3 which screws into the lower end of the socket as shown. The lower portion of the plug 3 is formed with a threaded neck 4, and on this threaded neck there is received a jam nut 5 which seats against the lower end of the socket 1 and ma be against the angular shoulder 6, which is formed, between the reduced neck and the body thereof. Below the neck 4 an angular or hexagonal nut '7 is formed integral with this neck, and below this nut the lower end of the plug is formed into a threaded nipple 8, which is adapted to screw into the end of the pipe or casing.

The lower portion of the plug 3 is provided with a bore 9, through which the polished rod 10 or piston rod reciprocates. The upper portion of the plug 3 is formed with an enlarged bore 11 forming a pocket to receive the packing 12. In the lower part of the pocket 11 a bottom ring 13 is*placed and upon the upper face of this bottom ring the packing 12 rests, as shown. On the 7 upper side of the packing 12 a follower ring Specification of Letters Patent.

Application filed February 23, 1910. Serial No.

Patented Oct. 11, 1910.

14 seats and the upper end of this ring 14 rests against the'upper head 15 of the socket Opposite the head 15 the outer face of the socket 1 is provided with notches or recesses 16, which enable the socket to beheld by means of a spanner Wrench. The uppen upper end of the socket 1 is formed with a counter bore 22 which is of the same diam-- eter as the bore 20 so as to form an extension thereof and in this counter bore 22 a bottom ring 23 seats. On the upper side the packing 21 is pressed by a follower ring 24, the upper end of which receives a thrust from the head 25 of the cap nut 19. On opposite sides-the-cap nut 19 is formed with threaded sockets 26 in which threaded spikes may be secured to increase the leverage for tightening the nut. The lower end of the neck 18 is formed into a hexagonal nut 27, which facilitates screwing the neck on the threaded nipple 17. The packing 21 constitutes the main packing, and this packing is normally maintained tightly pressed againstthe side of the rod by means of the nut 19, and as the packing wears the nut can be tightened up so that the box can be kept tight at this point.

The packing 12 constitutes an auxiliary packing, which is normally loose in its pocket 11. .When the packing 21 is to be ingbox. In this way the lower pocket 11 constitutesan auxiliary stufling box which is norinally inactive, but which is in operation when the upper box is to be repacked. On account of the fact that the lower packing 12 is normally not under compression it will require renewal of the packing only at a great intervals of time.

Having described our invention what we compress the packing in said last named claim as new and desire to secure by Letters ocket, Patent is: In witness that we claim the foregoing we A stuifing box having a main socket openhave hereunto subscribed our names this 5 ing downwardly, a plug screwing into said 15th day of February, 1910.

socket'and forming'a pocket adapted to re- J. H. REESE.

ceive packing, a tubular neck screwing on THERON F. DUNLAVY. the upper end of said socket and forming a Witnesses:

pocket adapted to receive acking, and a cap F. D. AMMEN,

10 nut screwing on said nec and adapted to EDMUND A. STRAUSE. 

